/**
 * Copyright 2011 Joao Miguel Pereira
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package main.java.eu.jpereira.trainings.designpatterns.structural.decorator.channel.decorator;

import main.java.eu.jpereira.trainings.designpatterns.structural.decorator.channel.SocialChannel;


/**
 * @author jpereira
 * 
 */
public class MessageTruncator extends SocialChannelDecorator {

    private int maxLength = 0;

    /**
     * @param maxLength
     */
    public MessageTruncator(int maxLength) {
            this.maxLength = maxLength;
    }

    /**
     * @param i
     * @param decoratedChannel
     */
    public MessageTruncator(int i, SocialChannel decoratedChannel) {
            this.maxLength = i;
            this.delegate = decoratedChannel;
    }

    /*
     * (non-Javadoc)
     * 
     * @see eu.jpereira.trainings.designpatterns.structural.decorator.channel.
     * SocialChannel#deliverMessage(java.lang.String)
     */
    @Override
    public void deliverMessage(String message) {
            if (message.length() > maxLength) {
                    StringBuilder builder = new StringBuilder();
                    builder.append(message.substring(0, maxLength - 3));
                    builder.append("...");
                    message = builder.toString();
            }
            delegate.deliverMessage(message);

    }

}